When light travels through areas of different air density, it bends. You’ve probably noticed the way distant pavement seems to shimmer on a hot day, or the way stars appear to twinkle. You’re seeing light that has been distorted as it passes through varying air densities, which are in turn created by varying temperatures and pressures.
Schlieren Flow Visualization can be used to visually capture these changes in density: the rising heat from a candle, the turbulence around an airplane wing, the plume of a sneeze … even sound. Special thanks to Mike Hargather, a professor of mechanical engineering at New Mexico Tech, who kindly provided a lot of these videos.
Most kids on this website don’t even know what this is
That’s a coffee table
“Weather can be a great friend or a terrible enemy. When the world turns it self up side down, sometimes you have to change the venue of your bike ride. To push on and do what is needed to reach the goals we have set for ourselves.” – Josh Hayes